This question is about gravitational waves postulated by Einstein.
Is gravitational radiation a form of mass/energy that can form momentum?
If it causes ripples in space-time, would space-time be susceptible to forming vortices if massive bodies passed each other at close distances and relativistic speeds?
Sean Carroll raised this possibility, but dismissed it because it was discredited in 2-dimensional space by Gerard 't Hooft.
- Has anyone investigated if 3-dimensional space would support space-time vortices, and whether such vortices might cause light cones to tilt as if they were caught in a whirlpool, with a tendency toward a timelike loop?
(R.A. Fessenden speculated about gravity waves and vortices in 1913, but he assumed an ether: http://archive.org/stream/jstor-1638835/1638835_djvu.txt.)
I apologize if this question is naive and too wide-ranging.